2011 Mercedes G-Class Owner's Manual - Page 219

Engine compartment ! Only use engine oils and oil filters which have been approved for vehicles with a service system. A list of the engine oils and oil filters that have been tested and approved according to the Mercedes-Benz specifications for service products can be found on the Internet at http:// www.mbusa.com (USA only). Further information on tested and approved engine oils and oil filters can be obtained from any authorized Mercedes-Benz Center. The following causes engine failure or damage to the exhaust system: Rusing engine oils and oil filters that are not specifically approved for the service system Rreplacing the engine oil and oil filter after having exceeded the interval for replacement prescribed by the maintenance system Rusing engine oil additives X 217 Turn cap : counter-clockwise and remove it. X Add the amount of oil required. Observe the specifications in the on-board computer when doing so or fill carefully to the maximum mark on the oil dipstick. i The difference in quantity between the MIN mark and the MAX mark on the dipstick is approximately 2.1 US qts. (2 l). Checking and adding other service products Coolant level Only check the coolant level when the vehicle is on a level surface and the engine has cooled down. X Turn the key to position 2(Y page 117) in the ignition lock. X Check the coolant temperature display in the instrument cluster. The coolant temperature must be below 158 ‡ (70 †). Example: engine oil cap G Warning Ruse In order to avoid any potentially serious burns: extreme caution when opening the hood if there are any signs of steam or coolant leaking from the cooling system, or Engine oil cap (G 55 AMG) Z Maintenance and care ! Do not add too much oil. If the oil level is above the "max" mark on the dipstick, too much oil has been added. This can lead to damage to the engine or the catalytic converter. Have excess oil siphoned off. For further information on engine oil, see (Y page 279). X Replace cap : on the filler neck and tighten clockwise. Ensure that the cap locks into place securely.